package cn.edu.swu.book;

import com.fasterxml.jackson.databind.ObjectMapper;
import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import java.io.IOException;
import java.sql.SQLException;

@WebServlet("/updateBefore")
public class UpdateBefore extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String id=req.getParameter("id");
        try {
            BOOK book;
            book= bookRepo.getInstance().getBookById(id);
            ObjectMapper objectMapper=new ObjectMapper();
            String json=objectMapper.writeValueAsString(book);
            resp.getWriter().print(json);
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }
}
